Home / 21,133.80-29,163.87-12,181.68

Finding the Fourth Proportional to 21,133.80, 29,163.87 and 12,181.68

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Solution

The fourth proportional to 21,133.80, 29,163.87 and 12,181.68 is: 16,810.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.80 : 29,163.87 = 12,181.68 : x
  2. Step 2: Convert to fraction form
    21,133.80/29,163.87 = 12,181.68/x
  3. Step 3: Cross multiply
    21,133.80x = 29,163.87 × 12,181.68
  4. Step 4: Simplify right side
    21,133.80x = 355,264,931.90
  5. Step 5: Solve for x
    x = 355,264,931.90/21,133.80
  6. Step 6: Final answer
    x = 16,810.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.